Speed-changing mechanism for motor-vehicles.



f l ALC. GRISCOM. l l SPEEOCHANGING MECHANISM FOR MOTOR VEHICLES.

APPLICATIONHLED f-Es. 2'9. `1916. 1,209,147. I y y v Patented De@19,`1916.

, Y *l l SHEET--SHEETL @um m WOO f A. C. GRISCOIVI. SPEED CHANGING MECHANISM ma mooafvsmcu-zs.

APPLICATION FILED FEB. 29 1916. l

Patented De.19,I9Ib.

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3 SHEETS-SHEET 2.

A A. C. GRISCOM. psPEED CHANGING MEcHANlsM Fon MOTOR VEHICLES.

APPLICATION FlLED FEB.29, 1916. 1,209,147. Patented De.19,1916.

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70 72 TIL-TTT. 7

` MDW 'y Ammer m88 I l E? ALFRED C. GRISCOM, v OF SANDY HOK, CONNECTICUT, ASSIGNOB 0F ONE-FOURELHv T0 HARRY B. CURTIS, 0F BRIDGEPORT, CONNECTICUT.

SPEED-ennemie MECHANISM ron MoTon-.vEnIcLEs Specication of Letters Patent.

Patented Dec. 19, 1916.

Application led February 29, 1916. Serial No. 81,255.

To all whom z't may concern.' y

Be it known that I, ALFRED C. GRIscoM, a citizen of the United States, residing at Sandy Hook, county of Fairfield,-State of Connecticut, have invented an lImprovement in Speed-Changing Mechanisms for Motor- Vehicles, of ication.

This invention has for its object to provide a new and improved speed `changing mechanism for motor vehicles which shall be smooth and positive in operation and will eliminate the hand speed change lever in common use, which is an unsightly and generally objectionable feature as ordinarily arranged. In my novel structure I provide a speed selecting lever upon the steering column and connect up the partsin such a manner that the actual shifting of the gears in changing speed is performed by the pedal clutch lever. `With these and other objects in view I `have devised the novel speed changing mechanism which I will now describe, referring to the accompanying drawings forming a part of this specification and using reference characters to indicate the several parts.

Figure 1 is a view partly in elevationand partly in longitudinal section, showing the installation of my novel speed changing mechanism in a car; Fig. 2 an enlarged detail view showing the speed selecting lever ,in plan and the steering column in section on the line 2-2 in Fig. 1, looking in the direction of the arrows; Fig.r 2a a section on the line 2*--2a in Fig. 1, llooking in the direction of the arrows; Fig. 3 a rear elevation of my novel mechanism, that is, as seen -from the right in Fig.. l; Fig. 4 a section onl the line 4 4 in Fig.` 3, looking in the direction of tlie arrows, the mechanism ap'- pearing in plan, in the second speed position; Fig. 5 a side elevation partly in section, the cover plate of the case being removed and the near speed selecting disk in position to produce the second speed, but the operating lever and parts controlled thereby remaining in the normal position and the change speed slide rods in the neutral position; Fig. 6 a side elevation with thecover plate removed, the near speed selecting disk being'partly broken away, and the operatinglever having been moved to an intermediate position,

which has placed which the following' is a speci.

the mechanism controlled the operating lever 1n position to produce the second vspeed upon further movementl of said lever; Fig.

7 a similar View, the movement of the opf erating .lever having beencompleted and the parts being 1 n the second speed position, as in Fig.' 4; Fig. 8 a'section on the line 8-#8 in Fig. 7, looking in the direction of the arrows; Fig. 9 a section on the line 9-9- in Fig. 7 looking in the direction of the arrows; Fig. 10 an enlarged perspective view of the head of one of the change speed slide rods; Fig. 11 a perspective viewon an enlarged scale of the slotted -spring controlled connectingL link; Fig. 12 a perspec' tive view of the speed selecting disks and the shaft by which they are carried, and Fig. 13 is an elevation partly broken away,

as seen from the left in Fig. 4, but showing the parts in the first speed position.

20. denotes so much of the body of a car as is necessary to illustrate the application thereto of'my novel speed changing mechanism,.21 the transmission case, 22 the case of my novel speed changing mechanism,

.which isrigidly secured in place contiguous to the transmission case, 23 the pedal clutch lever, whichl is spring controlled in the ordinary or in any preferred manner, 24 and 25 the changeV speed slide rods, and` 26 the steering column.

'The mechanism I have illustrated is adapted to produce three speeds forward and a reverse.

27 and 28 denote speed selecting disks carried by aspeed selecting disk shaft 29 journaled in case 22, hereinafter referred to as the case.l Each of the speed selecting disks is provided with two speednotches. Disk 27 is provided with a notch 30 for the reverse and anotch 31 forl first speed, and disk 28 is provided with a notch 32 for the second speedand a notch 33 for the third speed. Change speed slide rods 24 and 25 extend within the case and are provided with heads 34 and 35 respectively. I-Iead 34 is provided on its outer side with bevel nosed catches 36 and 37 which face in oppoadapted to oscillate on a shaft 42 in the case, a double arm 43 bridged at its outer end as at 55, an arm 44 and a double arm 45.

46 denotes as a whole a part which is broadly a two-armed bell crank lever. Part 46 comprises sleeves 47 and 48 which are adapted to oscillate on operating shaft 49 which is journaled in hubs 50 upon the case an arm 5l and a triple arm 52, two of the branches of said arm being bridged as at 53, so as to rigidly connect the three branches of arm 52, the two sleeves and arm 51 into a single rigid member.

54 denotes the operating lever which is rigidl secured to the operating shaft, and 56 a ouble arm having a hub 57 which is keyed to the operating shaft between sleeves 47 and 48. Arm 44 of part 40 and arm 51 of part 46 are connected by a link (in the present instance doubled) 58, and arm 45 of part 40is connected to arm 56, controlled by the operatinglever, by means of'a link 59 which is pivoted to arm 56 and 1s provided with an angle slot 60 through which a, pin 61 in arm 45 passes, the slotted end -of the link lying between the two branches of arm 45. A spring 68 secured to the link and bearing against sleeve 41 of part 40 between the branches of arm 45 normally'acts to force the link downward and to retain the end of the short arm of the angle slot in en'- gagement with pin 61. Co-acting'with the link and spring is a boss 69 on the inner face of the case, as will 'be more fully eX- plained.

62 and 63 denote dogs pivoted to arm 43 of part 40, and 64 and 65 denote dogs pivoted to' arm 52 of part 46. These dogs have the general shape of bell crank levers. Each dog is provided with! an abutment 66 adapted to be engaged by and to engage one v of the bevelnosed catches and with a hub;

67 adapted to engage one of the speed notches in a speed selecting disk; thus, bevel nosed catch 36, dog 64 and speed notch 30 in speed selecting disk 27 coperate in producing the reverse; bevel nosed catch 37, dog 62, and speed notch 31 in speed selecting disk 27 coperate in producing the first speed; bevel nosed catch 38, dog 65, and speed notch 32 in speed selecting disk 28 coperate in producing the second speed, and bevel nosed catch 39, dog 63 and speed notch 33 in speed selecting disk 28 coperate in producing the third speed, as will be more fully explained.

If no speed has been selected by operation of the speed selecting lever, then no speed notch will be in position to receive a hub 67 on a dog, and the hubs ofthe dogs will engage the peripheries of the speed selecting disks, the effect of which will be to retain the abutments of the dogs tilted downward out of position to engage the corresponding bevel nosed catches and consequently no movement of a change speed slide rod can be produced.

The dogs are retained in operative position by means of springs. Dogs 64 and 65 are each provided with a spring 70 adapted to bearon speed selecting disk shaft 29, and with a spring 7l, said springs 71 being adaptedvto bear respectively on sleeves 47 and 48 of part 46. Springs 70 and 71 act successively. That is to say, spring 71 becomes operative before spring 70 becomes inoperative. Dogs 62 and 63 are each provided with a spring 72 adapted to bear on speed selecting disk shaft 29, and with a spring 73 adapted to bear on sleeve 41 of part 40. Springs 72 and 73 act successively, the same as springs 70 and 71.

The speed selecting disks are controlled from the steering column and the change speed slide rods are connected up With the pedal clutch lever. Near the upper end of the steering column and just under the steering wheel is a quadrant 74 having `notches marked from right to left R, 1st, 2d, 3d, to indicate the reverse and first, second and third speeds.

75 denotes the speed selecting lever, which is rigidly secured to a rod 76 mounted to oscillate in the quadrant and in a plate 77 rigidly secured near the lower end of the steering column. The speed selecting lever carries a catch 78 which is adapted to engage either of the notches in the quadrant to lock the lever inl position to. produce the reverse or the desired speed forward. Connection with the speed selecting disk shaft may be made in any suitable manner. In the present instance, I have shown rod 76 as provided Vwlthan arm 79 and the speed selecting disk {shaftvas provided with l an arm 80, said arms being connected by a link 81.

ICU

Thev pedal clutch lever 23 in addition to its ordinary function (to engage and disengage the clutch, not shown), is connected up to operate the change speed slide rods which have heretofore ordinarily been operated by a change speed hand lever. The pedal clutch lever has formed integral therewith an arm 82 connected by means of a link 83 with operating lever 54. The change speed slide rods reciprocate in a hub 84, which is rigidly secured to case 22 and also to transmission case 21. The rods are held against rotation by means of dowels 85 engaginggrooves 86 in the rods. Each change speed slide rod is provided in its under side with three notches indicated by 87, each of which is adapted to beengaged by a spring catch 88, in the present instance a spring controlled ball, socketed in an enlargement of the hub. The actionof these Catches is to lock the changespeed slide rods in their neutral and in both operative positions. For example, in Fig. 5, slide rod 25 is engagement of the catch with the intermediate notch, said rod being locked in the second speed position by engagement of the catch withl the inner notch, and in the third speed position by engagement of the catch' with the outer notch.r The corresponding locking means for change speed slide rod 24 does not appear in the drawings. It will be obvious, however, that engagement of the corresponding catch with the intermediate notch will lock said rod in its neutral position, engagement of the catch with the inner notch will lock the rod'in the reverse position, and engagement of the catch with the outer notch will lock the rod in the rst speed position.

It should be noted that the action of the operating lever (controlled by the pedal clutch lever) is toswing arm 43 of part 40 and arm 52 of part 46 toward and from each other. These arms swing from the position shown in Fig. 5 to that shown in Fig. 6 and then back to the starting position, as in Fig. 7. If a speed has been selected, one of the dogs, when the parts are in the position shown in Fig. 6, will engage the corresponding bevel nosed catch and further movement will actuate the corresponding change speed slide rod, which, depending upon the speed selected, will be moved outward, as in Fig. 7, or inward, as in Fig. 13. When the pedal clutch lever -is actuated, its first effect upon the present mechanism is to return the previously operated change speed slide rod to the neutral position. This is eected by means of arm 43 of part 40 or arm 52 of part 46. -These arms are so shaped that some portion4 thereof will engage the head of each change speed slide rod when in either of vits operative positions. For example, in the position of the parts shown in Figs. 4 and 7, head 35 of change speed slide rod 25 will be moved by arm 52 of part46 from the position shown in Figs. 4 and 7 to its neutral position, asin Fig. 6. Starting with the parts in the neutral position, as in Fig. 5, movement of operating lever'54 will cause, when the parts are in the position shown in Fig. 6, enga ement of a bevel nosed catch on the hea of change speed slide rod' 25 by the corresponding dog.'

Continued movement of the operatinglever to the position in Fig. 7 will lace change speed slide rod 25 in the secon `speed position, as in Figs. 4'and 7. The return movement of operating lever 54 from the position in Fig. 7 to that in Fig. y the operator removes his foot j from the pedal clutch lever and the 'usual clutch spring, not shown, returns it to its normal position. The operating lever is now 1n the position shown in Fig. 5,1 but the other parts, except linkl 59, remain in the position.' shown in Fig. 7. The next actuation of the pedal clutch lever will cause arm 52 of part 5takes place when 46 to movechange speed slide rod 25 to the position shown in Fig. 6, in which position the dog will be, disengaged therefrom, and the rod left in lits neutral osition. Continued movement of the pe al clutch lever (through the operating lever) will now place the parts in operative position at the speed selected. If, however, no speed has been selected by operationof the speed selecting lever and said lever is in a position on the quadrant between two speeds, then no result whatever will follow operation of the pedal clutch lever beyond the placing of the last operated change speed slide rodgin the neutral position.

The operation"y of` the mechanism asl a whole is as follows: The operator selects the reverse or the kdesired speed forward by means of speed selecting lever 75, which is placed in alinement with'the corresponding notch in the quadrant 'and' locked there by. catch 7 8; Movement of the speed selecting lever through the connections described oscillates speed selecting disk shaft 29. and places one of the speed selecting disks thereon in position to coperate with the mechanism controlled by thepedal clutch lever in producing theselected speed. In the present instance, for illustration, the second speed has been selected, and in Fig. 2 the speed selecting leverl is shown in fthe second speed position, theeifect 'of which has been to oscillate shaft 29 and placespeed selecting disk 28 in the position shown in Figs. 5, 6,v and 7, speed notch 32 being in position to receive the ,hubl 67 on dog -65. In Fig. 5, the mechanism controlled by the operating lever (itself `controlled by the pedal clutch lever) still vremains in the neutral position.

The operator now actuates the pedalclut'ch lever in the usualmanner,the effect of which yis to swing the operating leverrfrom the positionshown in Fig. '5'to that shown in Fig.

7. In Fig. 6, I have shownpthe parts in an Fig. 5 toward gagement withtheendfof the shortarm of,l

said slot until. after 'theparts havepassed the position shownfin Fig. 6.' Upon -further movement of the operating lever from the position shown in Fig. 6, link 59 -will commence to movetoward the right and the left vend of said linkwill be swung downward, .which places the mid-length` of the.

outer edge of said link in engagement with 58. In ,moving continued movement of boss 69 on the case, the effect of which is to raise the link relatively tovpin 61, so that said pin will pass out of the short arm of the angle slot, as in Fig. 7.

The effect of operation of the speed selecting lever is to make movement of the car, reversel or forward, as selected, possible. This result is effected through the placing of one of the .four speed notches in position to receive the hub 67 of one of the dogs 62 or 63, carried by part 40, or 64 or 65, carried by part 46. The position of the speed notches in the speed selecting disks is such that the hub of one dog only can engage a speed notch at a time, and if no selection of speed is made by the speed selecting lever, the hubs of the dogs will engage the peripheries of the speed selecting disks, the abutments of the dogs will be tilted downward so that they cannot engage the bevel nosed catches, and consequently no movement of the change speed slide rods can be produced and no connection can be effected -between the engine and the wheels (not shown, as they form no portion of the present invention.) shown in Fig. 6, an abutment 66 upon one of the dogs will be in position to engage the corresponding bevel nosed catch upon one of the change speed slide rods. In the present instance, the operative catch is catch 38 on Slide rod 25, the operative dog is dog 65 carried by part 46, and the hub 67 of said vdog passes into speed notch 32 in speed selecting disk 28; Each dog, as already explained, is provided with` two springs.l These springs act normally to retain the dogs in the position shown in Fig. 5. As the parts move toward the position shown in Fig. 6, the abutment of dog 65 will engage the beveled nose of catch 38 and will be forced downward thereby against the power of the operative spring, which will lift the dog upward into engaging position the instant thel abutment has passed the catch, as clearly shown in Fig. 6. These springs operate successively. Before one spring passes out of engagement with speed selecting disk shaft 29, the other spring will have passed into engagement with sleeve 47 on the operatingv shaft, so that there is a continuous spring action to retain the dog in engagement with the catch.` As soon as a dog has become engaged with a bevel nosed catch (in the present instance dog 65 has engaged catch 38) the parts from the position shown in Fig. 6 toward the position shown in Fig. 7 will actuate the corresponding change speed slide rod, in the present instance rod 25, the effect of which is, through the operation of mechanism, not shown, within the transmission case, to produce forward movement ahead at second speed, the slide rod being locked in operative position by a spring catch 88.

When the parts reach the positionl -in Fig. 5.

The parts remain in the position just described so long as the operator retains the pedal clutch lever in the operative position. As soon vas the pedal clutch lever is released, however, the usual clutch spring not shown) returns the lever to its normal position as in Fig. l and returns the operating lever from the position shown in Fig. 7 to that in Fig. 5. The previously operated change speed slide rod is returned to its neutral position, as previously described, during ythe first half of the next movement of the pedal clutch lever. This movement is effected without change of position of parts 40 and 46 and the dogs carried thereby. The return movement of the operating lever without effect upon parts 40 and 46 results 'from the peculiar construction and operation of spring controlled slotted link 59. In the position shown in Fig. 7, pin 6l, carried by arm 45 of part 40, is lying at the intersection of the arms of the angle slot in the link. As soon as the return movement of the operating lever commences, arm 56 of said lever will move the link forward and the pin will pass into the long arm of the angle slot, the link being retained in engagement with boss 69 by spring 68. Shortly afterward, arm 56 will raisev the link out of engagement with the boss, and spring 68 will force the link downward and again seat the pin at the end of the shortl arm of the angle slot, in which position it will remain until the operating lever reaches the position shown in Fig. 5.

Suppose now that it is desired to change the speed, for example to the first speed. The operator sets the speed selecting lever at the first speed notch, which places speed notch 3l in speed selecting disk 27 in position to receive the hub 67 of dog 62, and then operates the pedal clutch lever. Before operation of the pedal clutch lever, parts 40 and 46, the dogs and the change speed slide rods were in the position shown in Fig. 7, and the operating lever in the position shown Operation of the pedal clutch lever swings operating vlever 54 toward the position shown in Fig. 7, and arm 52 of part 46 moves change speed slide rod 25 to the position shown in Fig. 6. As the corresponding speed notch, however, is now not in position to receive the hub of dog 65, said dog will be tilted downward'and disengaged from the bevel nosed catch, and simultaneously abutment 66 of dog 62 will engage bevel nosed catch 37 upon change speed slide rod 24. Movement of the operating lever from the position shown in Fig. 6 to that shown in Fig. 7, will carry change speed slide rod 24 to the position shown in Fig. 13 which produces first speed through mechanism, not shown, in the transmission case.

Having thus described my invention ll claim Y 1. In combination, a speed selecting disk opposite directions,

. of said parts and provi e operating shaft having an arm, a s

having speed notches, a change speed slide rod having bevel nose catches facing in opposite directions, an oscillating part comprising three arnis, an oscillating part comprising two ainis, spring controlled dogs ivoted to arnis of said parts and provide with hubs adapted to engage corresponding notches in the speed selecting disk and abutinents adapted to engage corresponding bevel nosed catches and be tilted thereby and then to engage said catches, an operating shaft having an arin, a slotted link connecting said arm with an arm ofthe three-arme oscillating part, and alink connecting another arm of the three-arnied oscillating part with an arm of the two-armed oscillating part, actuation of the operating shaft causing movement of the change speed 'slide rod to produce a predetermined spee 2. In combination, speed selecting disks having speed notches, change speed s ide rods having bevel nosed catches facing in a three-armed oscillating part, a two-armed oscillating part, dogs pivoted to arms of said parts and provi ed with hubs adapted to engage corresponding speed notches and abutments adapted to engage corresponding bevel nose catches and be tilted thereby and then to engage sai catches, an operating shaft having an arm, a slotted link connecting said arin withpan arm of the three-armed oscillating part, an a link connecting another arm of the threearmed oscillating part with an arm o two-armed oscillating part.

3. In combination, speed selecting disks having speed notches, a shaft by which they are carried, change speed slide rods having bevel nosed catchesfacing in opposite directions, a three-armed oscillating part, a twoarmed oscillating part, dogs pivoted to arms 'ded with hubs adaptcorresponding speed notches engage corresponding bevel nosed catches and be tilted thereby and then to enga'g`e said eitches, an

otted link connecting said arm with an arm o the three-armed oscillating part, a link connecting another arm of the three-armed oscillating part with an he two-armed oscillating part, and means for oscillating the speed sel ecting disk shaft toplace a predetermined speed notch 'in position to be ngaged by the hub of the corresponding speed selecting disks having speed notches, change speed slide rods having bevel nosed catches facing in opposite directions, a three-armed oscillating part, a two-armed oscillating part, dogs ivoted to arms of said parts and provided with hubs adapted to engage corresponding og. l

Ll. In combination,

speed notches and abutments ad gage corresponding bevel nosed catches and f theapted to enbe tilted thereby and then to lengage said catches, an operating shaft carrying an arm and an operating lever, a slotted link connecting said armwith an arm of the threearmed oscillating part, a link connecting another arm o the three-armed oscillating part with an arm of the two-armed oscillating part, a pedall clutch lever and operating connections between said lever and the operating lever..

having speed notches, a shaft by which they' are carried, a speed selecting lever, operating connections intermediate sai lever and the speed selecting disk shaft, change speed slide rods having bevel nosed catches facing in opposite directions, a three-armed oscillating part, a two-armed oscillating part, dogs ivoted to arms of said parts and provided with hubs adapted to engage corresponding speed notches and abutments adapted to engage corresponding bevel nosed catches and be tilted thereby and then to engage said catches, an operating' shaft having an arm, a slotted link connecting said arm withv an arm 0f the three-armed oscillating part, a

link connecting another arm of the threearmed oscillating lpart with an arm ofthe two-armed oscillating part, a pedal clutch lever and operating connections between said lever and an operating lever.

6. In combination, speed selecting disks having speed notches, a pedal clutch lever, an operating shaft, operating connections between the pedal clutch lever and the a three-armed oscillating part, a two-armed oscillating part, dogs pivoted to arms of said parts and provided with hubs adapted to engage speed notches i to pro speeds, a connection between the operating lever vand the three-armed oscillating part, and a connection between the three-armed loscillating part and the two-armed oscillatdetermined speed forward, a pedal clutch lever, an operating shaft,y operating connecsaid lever and said shaft, a two-armed and a three-armed oscillating part, dogspivoted to arms of said parts and adapted to operatively engagespeed notches, a slotted link connecting the operating lever and the three-armed oscillating part and a link connecting the three-armed oscillating part and the two-armed osc'llating part.

8. In combination, speed selecting disks having speed notches, a pedal clutch lever having an arm, an operating shaft having an arm, a link connecting said arms, a threearmed oscillating part, a two-armed oscillating part, dogs pivoted to arms of said parts and adapted to operatively engage spee tions between notches, for the purpose set forth, a slotted shaft,

i .75 5. In combination, speed selecting disks v lever and an arm of the three-armed oscilsai parts and adapted to coperate With lating part, and a link connecting another the speed selecting mechanism, and change arm of the three-armed oscillating part and speed slide rods having catches adapted first an arm of the two-armed oscillating part. to tilt and then to be engaged by the dogs. 70 9. n combination, speed selecting disks 14. In combination, speed selecting mechhaving speed notches, means for adjusting anism, a pedal clutch lever, a two-armed said disks to place the speed notch correand a t ree-armed oscillating part conlink connecting the arm of the operating spring controlled dogs pivoted to arms of mined speed forward in operative position, oted to arms of said parts and adapted to 75 trolled by the pedal clutch lever, a tWoanlsm, and change speed slide rods each proarmed and a t ree-armed oscillating part, vided with bevel nosed-catches facing in opdogs pivoted to arms of said ,parts and posite directions, each catch ,being adapted adapted to operatively engage speed notches, to e engaged by the corresponding dog to s@ an operating connection between the operatmove a change speed slide rod from the neuing lever and the three-armed oscillating tral to an operative position. part, and an operating connection between 15. In combination, speed selecting mechthe three-armed oscillating part and the anism, a pedal clutch lever, a two-armed two-armed oscillating part. and a three-armed oscillating part controlled g5 11 combination, speed selecting mechby the pedal clutch lever, dogs pivoted to anism, a pedal clutch ever, an operating arms of said parts and adapted to coperate shaft controlled by the pedal clutch lever, with the speed selecting mechanism, change a two-armed and a three-armed oscillating speed slide rods each provided with bevel part controlled by the operating lever, dogs nosed catches facing in opposite directions, 9@ pivoted to arms of said parts and adapted each catch being adapted to be engaged to coperate with the speed selecting mechaby the corresponding dog to move a change" nism, and change speed slide rods having speed slide.y rod from the neutral to an oper- 3@ with the dogsnforthe purpose set forth. c ange speed slide rods in neutral or opera- Q5 anism including disks having speed notches, 16. In combina-tion, speed selecting mecha pedal clutch lever, an operating shaft conanism, a pedal clutch lever, a two-armed trolled by the pedal clutch lever, a tWoand a three-armed oscillating part controlled armed and a t ree-armed oscillating part by the pedal clutch lever, dogs pivoted to ma@ controlled .by the operating lever, dogs pivarms of said parts and adapted to coperate oted to arms of said parts and having hubs With the speed selecting mechanism, change change speed slide rods having bevel nosed springs acting to force the dogs into en- 105 forth, and then to be engaged by the abutengaging position. ments, continued movement of the operatin l In combination, speed selecting disks lever causing actuation of the enga-ged slide having speed notches, a pedal clutch lever, 110 rod. a two-armed and a three-armed oscillating 12. In combination, speed selecting mechpart controlled by the pedal clutch lever, anism including disks havingspeed notches, dogs pivoted to arms of said `parts and a pedal clutch lever, an operating' shaft cona apted to engage corresponding speed trolled by the pedal clutch lever, a tWonotches, change speed slide rods provided 115 armed and a three-armed oscillating part with bevel nosed catches facing in opposite controlled by the operating lever, dogs pivdirections, and springs acting to force the oted to said parts and adapted to engage dogs into engagement With the catches. speed notches to produce predetermined 18. In combination, speed selecting disks speeds and change speed slide rods having having speed notches, a pedal clutch lever, 120 catches adapted to tilt the dogs, for the pura two-armed and a three-armed oscillating pose set fortlnand then to be engaged by part controlled by the pedal clutch lever, l e dogs, continued movement of the operatspringcontrolled dogs pivoted to arms of i gaged change speed slide rod. to engage corresponding speed notches and 12a In com ination, speed selecting mechwith a utments, and change speed slide rods anism, a pedal clutch lever, an operating provided with bevel nosed catches facing shaft controlled by the pedal clutch lever, in opposite directions, said catches acting a tivo-armed and a t ree-armed oscillating to tilt the dogs out of operative position part controlled by the operating lever, when engaged by the abutments. 13o

19. In combination, speed selecting disks having speed notches, a pedal clutch lever, change speed slide rods provided with bevel nosed catches facing in opposite directions, a two-armed and a three-armed oscillating part controlled by the pedal clutch lever, dogs pivoted to arms of said parts and adapted to engage hubs adaptedl to engage the speed notches, and means for forcing each dog into engaging position When the corresponding spee notch'is in position to receive thehub.

20. In combination, speed selecting mech-` anism, an oscillating operating shaft having an arm, a two-armed and a three-armed oscillating part, dogs pivoted to arms of said parts and adapted to coperate With the speed selecting mechanism, for the purpose set forth, a link connectingan arm of the three-armed oscillating part with an arm of the two-armed oscillating part, a pivoted to the arm of the operating shaft andy having an angle slot, a pin in another arm of the three-armed oscillating part engaging the angle slot, and a boss adapted to be engaged by the last mentioned link to raise said link, so that in the return movement of the operating shaft the pin kWill pass from one arm of the angle slot to the intersection of the arms of said slot and then'into the other arm of said slot, said movement causing no movement of the twoarmed and three-armed oscillating parts.

21. In combination, speed lselecting disks having speed notches, an oscillating operating shaft having an arm, a two-armed and a three-armed oscillating part, dogs pivoted to arms of said partsl and having hubs adapted to engage corresponding speed' notches, a link connecting an arm of the three-armed oscillating part with ,an of the two-armed oscillating part, a link pivoted to the arm of the operating shaft and having an angular slot, a pin in another arm of the three-armed oscillating part engaging the angle slot, and a boss adapted tobe engaged by the last mentioned link to raise said link and permit return movement of the operating shaft without movement of the two-armed and three-armed oscillating arts.

22. In combination,

arm

speed selecting mechanism, an oscillating operating shaft having an arm, a two-armed an a three-armed oscillating part, dogs pivoted to arms of said parts and adapted to coperatewith the speed selecting mechanism, a link connecting an arm of the three-armed With an arm of the two-armed oscillating part, a link pivoted to the arm of the operating shaft and having an angle slot, a pin in another arm of the three-armed oscilangle slot, a boss lating part engaging the n the last mentioned forth, and a sprig adapted to be engaged by the catches and having i forth.

link

oscillating part acting on, said link to retain it in operative osition. y

23. In combination, speed selectingmechanism, an oscillating operating shaft, a twoarmed and a three-armed oscillating part, operating connections between the operating shaft and the two-armedvand three-armed change yspeed slide rods and dogspivoted to arms of the oscillating parts and adapted to cooperate with the speed selecting mechanism and with the change speed slide rods, for the purpose set oscillating parts,

24. In combination, speed selecting mechanism, an Loscillating operating shaft, a twoarmed and a three-armed oscillating part,

'operating connectionsl between the operating shaft fand the two-armed and ythree-armed oscillating parts, change speed sliderods adapted ltobe engaged by said oscillatingy sol parts to return' operated slide rods to their neutral position, and of said oscillating parts and adapted to cooperate With the speed selecting mechanism and with the slide rods to produce predetermined speeds. a

25. In combination, speed selecting mechanism, an oscillating operating shaft having an arm, a two-armed and a three-armed oscillating part, a link connecting an arm of the three-armed oscillating part With an arm of the two-armed oscillating part, a link pivoted to the arm of the operating shaft and having an angle slot, a pin in another arm of the three-armed oscillating part engaging the angle slot, a boss adapted to be engaged by the last mentioned link, for the purpose set forth, change speed slide rods adapted to be engaged' y the oscillating parts to returnv operated slide rods to their neutral position,` and dogs pivoted to arms of said oscillating vparts and adapted to cooperate with the speed selecting mechanism and with theslide rods.

26. In combinatiomspeed selecting mech-y lating part engaging the angle slot,a boss' adapted to be engagedl by the last-mentioned link, change speed slide rods adapted to be engaged by the osc'llating parts', for` the purpose ,set forth, and spring controlled dogs pivotedto arms of the oscillating parts and adapted to coperate with the spee selecting mechanism and to engage and actuate the change speed slide rods.

27. 'In combination, speed selecting having speed notches,

an oscillating operating shaft having an arm, a two-armed and dogs pivoted to armsV disks l a three-armed oscillating part, a link con necting an arm of the three-'armed oscillating part with an arm of the two-armed oscillating part, a link pivoted to the arm of the operating shaft and having an angle slot, a pin in another arm of the three-armed oscillating part engaging the angle slot, a boss adapted to be engaged by the last mentioned link, change speed slide rods adapted to be engaged by the oscillating parts and provided with bevel nosed catches, and spring controlled dogs pivoted to arms of the oscillating parts and having hubs adapted to engage the speed notches and abutments adapted to engage the bevel nosed catches.

28. In combination, speed selecting disks having speed notches, a pedal clutch lever, an oscillating operating shaft controlled by the pedal clutch lever and having an arm, a two-armed and a three-armed,oscillating part, a link connecting an arm of the threearmed oscillating part with an arm of the two-armed oscillating part, a link pivoted to the arm of the operating shaft and having an angle slot, a pin in another arm of the three-armed oscillating part engaging the angle slot, a boss adapted to e engaged by the last mentioned link, change speed slide by the oscillating rods adapted to be engaged part-s, for the purpose set forth, and provided with bevel nosed catches, and dogs pivoted to arms of the oscillating parts and adapted to engage the speed notches and also to engage the bevel nosed catches.

29. In combination, speed selecting mechanism, a pedal clutch lever, change speed slide rods, two-armed and three-armed oscillating parts operated by the pedal Aclutch lever and adapted to engage the slide rods, for the purpose set forth, and dogs pivoted to the oscillating parts and adapted to actuand to cooperate with the speed selecting mechanism in producing predetermined speeds.

30. In combination, speed selecting disks having speed lnotclies, a pedal clutch lever, change speed slide rods having heads provided With bevel nosed catches, two-armed and three-armed oscillating parts operated by the pedal clutch lever and adapted to engage the heads of the slide rods, for the purpose set forth, pivoted to the oscillating parts and adapted to engage the change speed slide rods and having hubs adapted to engage the corresponding speed notches.

In testimony whereof I aiiix my signature.

ALFRED C. GRISCOM. 

